Rename metadata directories

This renames:
 - `tests/wpt/metadata` → `tests/wpt/meta-legacy-layout`
 - `tests/wpt/metadata-layout-2020` → `tests/wpt/meta`
 - `tests/wpt/mozilla/meta` → `tests/wpt/mozilla/meta-legacy-layout`
 - `tests/wpt/mozilla/meta-layout-2020` → `tests/wpt/mozilla/meta`

tests/wpt/meta/custom-elements/reactions/Animation.html.ini

@@ -0,0 +1,9 @@
+[Animation.html]
+  [Animation.animate must enqueue an attributeChanged reaction when it adds the observed style attribute]
+    expected: FAIL
+
+  [Animation.animate must enqueue an attributeChanged reaction when it mutates the observed style attribute]
+    expected: FAIL
+
+  [Animation.animate must not enqueue an attributeChanged reaction when it mutates the style attribute but the style attribute is not observed]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/AriaMixin-element-attributes.html.ini

@@ -0,0 +1,48 @@
+[AriaMixin-element-attributes.html]
+  [ariaActiveDescendantElement in Element must enqueue an attributeChanged reaction when adding aria-activedescendant content attribute]
+    expected: FAIL
+
+  [ariaActiveDescendantElement in Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaControlsElements in Element must enqueue an attributeChanged reaction when adding aria-controls content attribute]
+    expected: FAIL
+
+  [ariaControlsElements in Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaDescribedByElements in Element must enqueue an attributeChanged reaction when adding aria-describedby content attribute]
+    expected: FAIL
+
+  [ariaDescribedByElements in Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaDetailsElements in Element must enqueue an attributeChanged reaction when adding aria-details content attribute]
+    expected: FAIL
+
+  [ariaDetailsElements in Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaErrorMessageElement in Element must enqueue an attributeChanged reaction when adding aria-errormessage content attribute]
+    expected: FAIL
+
+  [ariaErrorMessageElement in Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaFlowToElements in Element must enqueue an attributeChanged reaction when adding aria-flowto content attribute]
+    expected: FAIL
+
+  [ariaFlowToElements in Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaLabelledByElements in Element must enqueue an attributeChanged reaction when adding aria-labelledby content attribute]
+    expected: FAIL
+
+  [ariaLabelledByElements in Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaOwnsElements in Element must enqueue an attributeChanged reaction when adding aria-owns content attribute]
+    expected: FAIL
+
+  [ariaOwnsElements in Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/AriaMixin-string-attributes.html.ini

@@ -0,0 +1,228 @@
+[AriaMixin-string-attributes.html]
+  [ariaAtomic on Element must enqueue an attributeChanged reaction when adding aria-atomic content attribute]
+    expected: FAIL
+
+  [ariaAtomic on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaAutoComplete on Element must enqueue an attributeChanged reaction when adding aria-autocomplete content attribute]
+    expected: FAIL
+
+  [ariaAutoComplete on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaBusy on Element must enqueue an attributeChanged reaction when adding aria-busy content attribute]
+    expected: FAIL
+
+  [ariaBusy on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaChecked on Element must enqueue an attributeChanged reaction when adding aria-checked content attribute]
+    expected: FAIL
+
+  [ariaChecked on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaColCount on Element must enqueue an attributeChanged reaction when adding aria-colcount content attribute]
+    expected: FAIL
+
+  [ariaColCount on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaColIndex on Element must enqueue an attributeChanged reaction when adding aria-colindex content attribute]
+    expected: FAIL
+
+  [ariaColIndex on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaColSpan on Element must enqueue an attributeChanged reaction when adding aria-colspan content attribute]
+    expected: FAIL
+
+  [ariaColSpan on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaCurrent on Element must enqueue an attributeChanged reaction when adding aria-current content attribute]
+    expected: FAIL
+
+  [ariaCurrent on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaDisabled on Element must enqueue an attributeChanged reaction when adding aria-disabled content attribute]
+    expected: FAIL
+
+  [ariaDisabled on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaExpanded on Element must enqueue an attributeChanged reaction when adding aria-expanded content attribute]
+    expected: FAIL
+
+  [ariaExpanded on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaHasPopup on Element must enqueue an attributeChanged reaction when adding aria-haspopup content attribute]
+    expected: FAIL
+
+  [ariaHasPopup on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaHidden on Element must enqueue an attributeChanged reaction when adding aria-hidden content attribute]
+    expected: FAIL
+
+  [ariaHidden on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaInvalid on Element must enqueue an attributeChanged reaction when adding aria-invalid content attribute]
+    expected: FAIL
+
+  [ariaInvalid on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaKeyShortcuts on Element must enqueue an attributeChanged reaction when adding aria-keyshortcuts content attribute]
+    expected: FAIL
+
+  [ariaKeyShortcuts on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaLabel on Element must enqueue an attributeChanged reaction when adding aria-label content attribute]
+    expected: FAIL
+
+  [ariaLabel on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaLevel on Element must enqueue an attributeChanged reaction when adding aria-level content attribute]
+    expected: FAIL
+
+  [ariaLevel on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaLive on Element must enqueue an attributeChanged reaction when adding aria-live content attribute]
+    expected: FAIL
+
+  [ariaLive on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaModal on Element must enqueue an attributeChanged reaction when adding aria-modal content attribute]
+    expected: FAIL
+
+  [ariaModal on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaMultiLine on Element must enqueue an attributeChanged reaction when adding aria-multiline content attribute]
+    expected: FAIL
+
+  [ariaMultiLine on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaMultiSelectable on Element must enqueue an attributeChanged reaction when adding aria-multiselectable content attribute]
+    expected: FAIL
+
+  [ariaMultiSelectable on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaOrientation on Element must enqueue an attributeChanged reaction when adding aria-orientation content attribute]
+    expected: FAIL
+
+  [ariaOrientation on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaPlaceholder on Element must enqueue an attributeChanged reaction when adding aria-placeholder content attribute]
+    expected: FAIL
+
+  [ariaPlaceholder on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaPosInSet on Element must enqueue an attributeChanged reaction when adding aria-posinset content attribute]
+    expected: FAIL
+
+  [ariaPosInSet on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaPressed on Element must enqueue an attributeChanged reaction when adding aria-pressed content attribute]
+    expected: FAIL
+
+  [ariaPressed on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaReadOnly on Element must enqueue an attributeChanged reaction when adding aria-readonly content attribute]
+    expected: FAIL
+
+  [ariaReadOnly on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaRelevant on Element must enqueue an attributeChanged reaction when adding aria-relevant content attribute]
+    expected: FAIL
+
+  [ariaRelevant on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaRequired on Element must enqueue an attributeChanged reaction when adding aria-required content attribute]
+    expected: FAIL
+
+  [ariaRequired on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaRoleDescription on Element must enqueue an attributeChanged reaction when adding aria-roledescription content attribute]
+    expected: FAIL
+
+  [ariaRoleDescription on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaRowCount on Element must enqueue an attributeChanged reaction when adding aria-rowcount content attribute]
+    expected: FAIL
+
+  [ariaRowCount on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaRowIndex on Element must enqueue an attributeChanged reaction when adding aria-rowindex content attribute]
+    expected: FAIL
+
+  [ariaRowIndex on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaRowSpan on Element must enqueue an attributeChanged reaction when adding aria-rowspan content attribute]
+    expected: FAIL
+
+  [ariaRowSpan on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaSelected on Element must enqueue an attributeChanged reaction when adding aria-selected content attribute]
+    expected: FAIL
+
+  [ariaSelected on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaSetSize on Element must enqueue an attributeChanged reaction when adding aria-setsize content attribute]
+    expected: FAIL
+
+  [ariaSetSize on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaSort on Element must enqueue an attributeChanged reaction when adding aria-sort content attribute]
+    expected: FAIL
+
+  [ariaSort on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaValueMax on Element must enqueue an attributeChanged reaction when adding aria-valuemax content attribute]
+    expected: FAIL
+
+  [ariaValueMax on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaValueMin on Element must enqueue an attributeChanged reaction when adding aria-valuemin content attribute]
+    expected: FAIL
+
+  [ariaValueMin on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaValueNow on Element must enqueue an attributeChanged reaction when adding aria-valuenow content attribute]
+    expected: FAIL
+
+  [ariaValueNow on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ariaValueText on Element must enqueue an attributeChanged reaction when adding aria-valuetext content attribute]
+    expected: FAIL
+
+  [ariaValueText on Element must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/CSSStyleDeclaration.html.ini

@@ -0,0 +1,30 @@
+[CSSStyleDeclaration.html]
+  [cssFloat on CSSStyleDeclaration must enqueue an attributeChanged reaction when it adds the observed style attribute]
+    expected: FAIL
+
+  [cssFloat on CSSStyleDeclaration must not enqueue an attributeChanged reaction when it adds the style attribute but the style attribute is not observed]
+    expected: FAIL
+
+  [A webkit prefixed camel case attribute (webkitFilter) on CSSStyleDeclaration must enqueue an attributeChanged reaction when it adds the observed style attribute]
+    expected: FAIL
+
+  [A webkit prefixed camel case attribute (webkitFilter) on CSSStyleDeclaration must not enqueue an attributeChanged reaction when it adds the style attribute but the style attribute is not observed]
+    expected: FAIL
+
+  [A webkit prefixed camel case attribute (webkitFilter) on CSSStyleDeclaration must enqueue an attributeChanged reaction when it mutates the observed style attribute]
+    expected: FAIL
+
+  [A webkit prefixed camel case attribute (webkitFilter) on CSSStyleDeclaration must not enqueue an attributeChanged reaction when it mutates the style attribute but the style attribute is not observed]
+    expected: FAIL
+
+  [A webkit prefixed dashed property (-webkit-filter) on CSSStyleDeclaration must enqueue an attributeChanged reaction when it adds the observed style attribute]
+    expected: FAIL
+
+  [A webkit prefixed dashed property (-webkit-filter) on CSSStyleDeclaration must not enqueue an attributeChanged reaction when it adds the style attribute but the style attribute is not observed]
+    expected: FAIL
+
+  [A webkit prefixed dashed property (-webkit-filter) on CSSStyleDeclaration must enqueue an attributeChanged reaction when it mutates the observed style attribute]
+    expected: FAIL
+
+  [A webkit prefixed dashed property (-webkit-filter) on CSSStyleDeclaration must not enqueue an attributeChanged reaction when it mutates the style attribute but the style attribute is not observed]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/HTMLElement.html.ini

@@ -0,0 +1,30 @@
+[HTMLElement.html]
+  [tabIndex on HTMLElement must enqueue an attributeChanged reaction when adding tabindex content attribute]
+    expected: FAIL
+
+  [tabIndex on HTMLElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [accessKey on HTMLElement must enqueue an attributeChanged reaction when adding accesskey content attribute]
+    expected: FAIL
+
+  [accessKey on HTMLElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [draggable on HTMLElement must enqueue an attributeChanged reaction when adding draggable content attribute]
+    expected: FAIL
+
+  [draggable on HTMLElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [spellcheck on HTMLElement must enqueue an attributeChanged reaction when adding spellcheck content attribute]
+    expected: FAIL
+
+  [spellcheck on HTMLElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [innerText on HTMLElement must enqueue a disconnected reaction]
+    expected: FAIL
+
+  [outerText on HTMLElement must enqueue a disconnected reaction]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLAreaElement.html.ini

@@ -0,0 +1,36 @@
+[HTMLAreaElement.html]
+  [alt on HTMLAreaElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [alt on HTMLAreaElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [coords on HTMLAreaElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [coords on HTMLAreaElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [shape on HTMLAreaElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [shape on HTMLAreaElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [download on HTMLAreaElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [download on HTMLAreaElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [ping on HTMLAreaElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [ping on HTMLAreaElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [referrerPolicy on HTMLAreaElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [referrerPolicy on HTMLAreaElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLBaseElement.html.ini

@@ -0,0 +1,6 @@
+[HTMLBaseElement.html]
+  [target on HTMLBaseElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [target on HTMLBaseElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLButtonElement.html.ini

@@ -0,0 +1,6 @@
+[HTMLButtonElement.html]
+  [autofocus on HTMLButtonElement must enqueue an attributeChanged reaction when adding autofocus content attribute]
+    expected: FAIL
+
+  [autofocus on HTMLButtonElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLEmbedElement.html.ini

@@ -0,0 +1,24 @@
+[HTMLEmbedElement.html]
+  [src on HTMLEmbedElement must enqueue an attributeChanged reaction when adding src content attribute]
+    expected: FAIL
+
+  [src on HTMLEmbedElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [type on HTMLEmbedElement must enqueue an attributeChanged reaction when adding type content attribute]
+    expected: FAIL
+
+  [type on HTMLEmbedElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [width on HTMLEmbedElement must enqueue an attributeChanged reaction when adding width content attribute]
+    expected: FAIL
+
+  [width on HTMLEmbedElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [height on HTMLEmbedElement must enqueue an attributeChanged reaction when adding height content attribute]
+    expected: FAIL
+
+  [height on HTMLEmbedElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLImageElement.html.ini

@@ -0,0 +1,12 @@
+[HTMLImageElement.html]
+  [sizes on HTMLImageElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [sizes on HTMLImageElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [decoding on HTMLImageElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [decoding on HTMLImageElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLMapElement.html.ini

@@ -0,0 +1,6 @@
+[HTMLMapElement.html]
+  [name on HTMLMapElement must enqueue an attributeChanged reaction when adding name content attribute]
+    expected: FAIL
+
+  [name on HTMLMapElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLMetaElement.html.ini

@@ -0,0 +1,6 @@
+[HTMLMetaElement.html]
+  [httpEquiv on HTMLMetaElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [httpEquiv on HTMLMetaElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLMeterElement.html.ini

@@ -0,0 +1,36 @@
+[HTMLMeterElement.html]
+  [value on HTMLMeterElement must enqueue an attributeChanged reaction when adding value content attribute]
+    expected: FAIL
+
+  [value on HTMLMeterElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [min on HTMLMeterElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [min on HTMLMeterElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [max on HTMLMeterElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [max on HTMLMeterElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [low on HTMLMeterElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [low on HTMLMeterElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [high on HTMLMeterElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [high on HTMLMeterElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [optimum on HTMLMeterElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [optimum on HTMLMeterElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLModElement.html.ini

@@ -0,0 +1,2 @@
+[HTMLModElement.html]
+  expected: ERROR

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLOListElement.html.ini

@@ -0,0 +1,18 @@
+[HTMLOListElement.html]
+  [reversed on HTMLOListElement must enqueue an attributeChanged reaction when adding reversed content attribute]
+    expected: FAIL
+
+  [reversed on HTMLOListElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [start on HTMLOListElement must enqueue an attributeChanged reaction when adding start content attribute]
+    expected: FAIL
+
+  [start on HTMLOListElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [type on HTMLOListElement must enqueue an attributeChanged reaction when adding type content attribute]
+    expected: FAIL
+
+  [type on HTMLOListElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLOptGroupElement.html.ini

@@ -0,0 +1,2 @@
+[HTMLOptGroupElement.html]
+  expected: ERROR

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLParamElement.html.ini

@@ -0,0 +1,12 @@
+[HTMLParamElement.html]
+  [name on HTMLParamElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [name on HTMLParamElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [value on HTMLParamElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [value on HTMLParamElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLQuoteElement.html.ini

@@ -0,0 +1,12 @@
+[HTMLQuoteElement.html]
+  [cite on blockquote use HTMLQuoteElement must enqueue an attributeChanged reaction when adding cite content attribute]
+    expected: FAIL
+
+  [cite on blockquote use HTMLQuoteElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [cite on q use HTMLQuoteElement must enqueue an attributeChanged reaction when adding cite content attribute]
+    expected: FAIL
+
+  [cite on q use HTMLQuoteElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLSlotElement.html.ini

@@ -0,0 +1,2 @@
+[HTMLSlotElement.html]
+  expected: ERROR

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLStyleElement.html.ini

@@ -0,0 +1,6 @@
+[HTMLStyleElement.html]
+  [media on HTMLStyleElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [media on HTMLStyleElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLTableCellElement.html.ini

@@ -0,0 +1,24 @@
+[HTMLTableCellElement.html]
+  [headers on HTMLTableCellElement in td must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [headers on HTMLTableCellElement in td must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [headers on HTMLTableCellElement in th must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [headers on HTMLTableCellElement in th must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [scope on HTMLTableCellElement in th must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [scope on HTMLTableCellElement in th must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [abbr on HTMLTableCellElement in th must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [abbr on HTMLTableCellElement in th must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL

tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLTableColElement.html.ini

@@ -0,0 +1,6 @@
+[HTMLTableColElement.html]
+  [span on HTMLTableColElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [span on HTMLTableColElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL